Obviously Excel 2007 - from the problem description and mention of .xlsx files.

I've encountered the same thing, as have others. It appears that it wants
to save the workspace to a SharePoint server. I haven't found the cure for
it to get it to save as a workspace like previous versions. Maybe someone
smarter than me will come along and enlighten us both. But I wanted you to
know that you're not alone on this one.

"Chris Cullen" wrote:

I am trying to save four Excel workbooks as a Workspace. When I press the
Save button I get an error message that says "This extension cannot be used
with the selected file type. Change the file extension in the File text name
box or select a different file type by changing the Save as type.

The only option in Save As is Workspaces.


All four workbooks are saved as .xlsx files. Have I saved the workbooks in
the wrong format to use to create a workspace?

Thanks for any help.